If you enjoy the outdoors, Marquette does have a variety of recreational opportunities.
As a biker myself, I enjoy visiting the various bike shops in Marquette. Most even have bikes you can rent. Here is a link to those shops: Marquette Bike Shops
If you enjoy downhill skiing, consider Marquette Mountain
For the best cross country skiing opportunities in Marquette and near Big Bay here is a good resource: Nordic Skiing
If hiking is something you enjoy, there are some great trail systems around Marquette and Munising. Here is a link to Superior Trails
For fishing opportunities, I have included a link to the DNR’s website which includes fishing reports throughout the UP. Michigan DNR